X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2FLOGIC%2FPNF%2Fdefs.ma;h=77fe6d5771f812793dbaad6d1194cba72febd459;hb=8ae1653eb75d2b57c50e077c49cb9d078313ea9d;hp=feea35b43b031964ad28d4b575a8c8cb33c9964f;hpb=add325fb02ab0e46a2c7bbffb2e9c980128f0f69;p=helm.git

diff --git a/helm/software/matita/contribs/LOGIC/PNF/defs.ma b/helm/software/matita/contribs/LOGIC/PNF/defs.ma
index feea35b43..77fe6d577 100644
--- a/helm/software/matita/contribs/LOGIC/PNF/defs.ma
+++ b/helm/software/matita/contribs/LOGIC/PNF/defs.ma
@@ -12,14 +12,16 @@
 (*                                                                        *)
 (**************************************************************************)
 
-set "baseuri" "cic:/matita/LOGIC/PNF/defs".
 
-(* NORMAL FORM PREDICATE FOR PARALLEL REDUCTION
+
+(* NORMAL FORM PREDICATE FOR PROOFS IN CONTEXT
+   For cut elimination
 *)
 
+include "PEq/defs.ma".
 include "PRed/defs.ma".
-(*
-inductive PNF: Proof \to Prop \def
-   | pnf: \forall p. (\forall q. p => q \to p = q) \to PNF p
+
+inductive PNF (P:Context) (p:Proof): Prop \def
+   | pnf: (\forall q,Q,S. [P, p, S] => [Q, q, S] \to [P, p] = [Q, q]) \to 
+          PNF P p
 .
-*)